Django tests run, but don't gather coverage

[OutOfFocus4]

Type: Bug

Behaviour

The new test adapter properly runs Django tests, but fails to gather coverage data from those tests.

Steps to reproduce:

1. Create a new directory /tmp/poc
2. Create and activate a Python virtual environment:

   python -m venv /tmp/poc/.venv
   source /tmp/poc/.venv/bin/activate

3. Install Django and coverage

   pip install django coverage

4. Create a new Django project

   django-admin startproject poc /tmp/poc

5. Create the file /tmp/poc/.env with the following:

   MANAGE_PY_PATH=/tmp/poc/manage.py

6. Create a file /tmp/poc/poc/tests.py with the following:

   from django.test import TestCase
   
   class POCTest(TestCase):
       def test_poc(self):
           pass

7. Create the file /tmp/poc/.vscode/settings.json with the following:

   {
       "python.testing.unittestEnabled": true,
       "python.testing.unittestArgs": [
       ]
   }

8. Open the poc project in VS Code
9. Once the tests are configured, the POCTestCase should be in the testing panel. Run it with coverage
10. The test will succeed, but the coverage for all files except /tmp/poc/poc/__init__.py will be 0%.

Extension version: 2025.0.0
VS Code version: Code 1.97.0 (Universal) (33fc5a94a3f99ebe7087e8fe79fbe1d37a251016, 2025-02-04T22:41:26.688Z)
OS version: Darwin arm64 24.3.0
Modes:

• Python version (& distribution if applicable, e.g. Anaconda): 3.11.6
• Type of virtual environment used (e.g. conda, venv, virtualenv, etc.): Venv
• Value of the python.languageServer setting: Default

User Settings

languageServer: "Pylance"

experiments
• enabled: false

Installed Extensions

Extension Name	Extension Id	Version
black-formatter	ms-	2024.6.0
cpptools	ms-	1.23.6
debugpy	ms-	2025.0.0
isort	ms-	2023.10.1
js-debug	ms-	1.97.0
js-debug-companion	ms-	1.1.3
python	ms-	2025.0.0
remote-explorer	ms-	0.4.3
remote-ssh	ms-	0.117.0
remote-ssh-edit	ms-	0.87.0
rust-analyzer	rus	0.3.2299
vscode-js-profile-table	ms-	1.0.10
vscode-pylance	ms-	2025.2.1
vscode-yaml	red	1.16.0

System Info

Item	Value
CPUs	Apple M1 Max (10 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	4, 3, 2
Memory (System)	32.00GB (2.37GB free)
Process Argv	--crash-reporter-id 2c081035-5e61-4ab4-8517-c976790ae1b3
Screen Reader	no
VM	0%

[eleanorjboyd]

coverage not yet supported with Django: #24199